TDC Offset Adjustment (Turbo/EFI)

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

If TDC offset is out of range, turn engine off, loosen fuel injection pump flange nuts. Turn fuel injection pump slightly (one mm = 2 degrees).

To advance timing, rotate pump toward driver's side.
To retard timing, rotate pump toward passenger's side.

NOTE: Repeat TDC offset relearn procedure. It may be necessary to adjust fuel injection pump several times until correct offset is achieved.